Inside a mysterious notebook, eleven-year-old Sammy discovers a message: Christmas is in danger! Someone has kidnapped Santa Claus, and Sammy must rush to magical Yululand, somewhere in Rovaniemi, to save him. Otherwise, the Christmas celebration will have to be canceled this year! Very soon, Sammy will find himself entangled in a wonderful adventure: talking reindeer, flying sleighs, dangerous trolls, and lovable elves accompany him on his journey to Yululand. But time is running out. Solve the puzzles and help Sammy save Christmas!